Pith Number

pith:U76A6R6R

pith:2019:U76A6R6RAFPEW4IDWWDW4HZ4XU

not attested not anchored not stored refs pending

Curvas de contato no espa\c{c}o projetivo

Eden Amorim

arxiv:1907.03973 v1 · 2019-07-09 · math.AG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U76A6R6RAFPEW4IDWWDW4HZ4XU}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:41:06.160498Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7fc0f47d1015e4b7103b5876e1f3cbd34a7998186a031fc192c5e06cd690846

Aliases

arxiv: 1907.03973 · arxiv_version: 1907.03973v1 · doi: 10.48550/arxiv.1907.03973 · pith_short_12: U76A6R6RAFPE · pith_short_16: U76A6R6RAFPEW4ID · pith_short_8: U76A6R6R

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/U76A6R6RAFPEW4IDWWDW4HZ4XU \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a7fc0f47d1015e4b7103b5876e1f3cbd34a7998186a031fc192c5e06cd690846

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b3f1a55dbd50af0d9769dca0a014f12326b647a704291a664a4cb542f7191280",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-07-09T03:53:56Z",
    "title_canon_sha256": "068d292767855b71cdb46754c0167ed60cb3929a5c1e260aa7423661112c411f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.03973",
    "kind": "arxiv",
    "version": 1
  }
}